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\frac{9x}{15\left(x-2\right)}-\frac{6}{3x-6}
Factor the expressions that are not already factored in \frac{9x}{15x-30}.
\frac{3x}{5\left(x-2\right)}-\frac{6}{3x-6}
Cancel out 3 in both numerator and denominator.
\frac{3x}{5\left(x-2\right)}-\frac{6}{3\left(x-2\right)}
Factor 3x-6.
\frac{3\times 3x}{15\left(x-2\right)}-\frac{6\times 5}{15\left(x-2\right)}
To add or subtract expressions, expand them to make their denominators the same. Least common multiple of 5\left(x-2\right) and 3\left(x-2\right) is 15\left(x-2\right). Multiply \frac{3x}{5\left(x-2\right)} times \frac{3}{3}. Multiply \frac{6}{3\left(x-2\right)} times \frac{5}{5}.
\frac{3\times 3x-6\times 5}{15\left(x-2\right)}
Since \frac{3\times 3x}{15\left(x-2\right)} and \frac{6\times 5}{15\left(x-2\right)} have the same denominator, subtract them by subtracting their numerators.
\frac{9x-30}{15\left(x-2\right)}
Do the multiplications in 3\times 3x-6\times 5.
\frac{3\left(3x-10\right)}{15\left(x-2\right)}
Factor the expressions that are not already factored in \frac{9x-30}{15\left(x-2\right)}.
\frac{3x-10}{5\left(x-2\right)}
Cancel out 3 in both numerator and denominator.
\frac{3x-10}{5x-10}
Expand 5\left(x-2\right).